Fig. 44. — Egg of 
Opisfhorchis fe- 
linem. S30. 
After Brauii. 
1903. p. ISo. fig. 
105. 
This parasite has been reported for man in Prussia, and AVinogradolf 
found it in Siberia in S (or 9) out of 124 post-mortem examinations of 
human cadavers. It is essentially an Old 
IV orld species, but it may be found at 
any time in Europeans who have immi- 
grated to the United States, and the 
possibility is by no means excluded that 
it may be found in American ti’oops who 
have served in China or the Philippines. 
Ward (1895) has recorded this species 
for cats in Nebraska, but a comparison 
of his specimens with 
authentic material of 0. 
feJineus from Europe has 
convinced both him and me 
that the Nebraskan parasite 
represents a distinct form. 
Since it is so closely allied 
to 0. feJineus, further <ince 
both species occur in cats 
and the European form oc- 
curs in man also, it need occasion no sur- 
prise if Ward's parasite is found sooner 
or later in man. Its characters may be 
seen from the following diagnosis; 
OpiMhorclds psev.dofeUnev$ (I Ward. 19<jl i fig. 
45): Opisthorchis: 12 to 20 mm. long. 1 to 2.5 
mm. broad; form somewhat similar to that of 
0. jelineu-s, but more elongate. Oral sucker 0. 355 
mm. by 0.414 mm., terminal to subterminal; 
ventral acetabulum somewhat smaller, 0.247 mm. 
bv 0.240 mm., situated slightly anterior of border 
between first and second anterior fourths of body. 
Skin provided with minute scale-like spines 
which are lacking, however, on posterior portion 
of body. Pharynx 0.212 mm. by 0.219 mm.; 
esophagus 0.175 mm. long; intestinal ceca extend 
to posterior extremity. Male organs: Testicles 
round or lobate. Female organs: Uterus well 
5 T.. shell gland: other letters same as developed, the coils often being quite crowded; 
fig.42. ( AiterStiles»i:HassaIl.iS94,fig.6 . 1 globular; receptaculum seminis large, 
postero-lateral of ovary; Atellaria divided each side into an antovarial portion 
^Syxoxvwis. — Fistoma felineurn’' of Ward, 1895; Opisthorchis psendof eh neus 55 ard, 
1901. 
Bibliography. — For more detailed description see Ward, 1895, pp. 152-158, 
Fig. 43 . — Opisthorchis felineus from a cat, 
collected in Prussia by Max Braun. 
Greatly enlarged to show the anatomy: 
or., ovary; r. s., receptaculum semini 
